Add Data Saver support to Cronet

components/cronet/android/cronet_url_request_adapter.cc

Index: components/cronet/android/cronet_url_request_adapter.cc
diff --git a/components/cronet/android/cronet_url_request_adapter.cc b/components/cronet/android/cronet_url_request_adapter.cc
index cec7756e122deaaa4e4bc9cc737d989b3ffecc96..869360b30582c02ede0a9874a4c7d311a00da8a8 100644
--- a/components/cronet/android/cronet_url_request_adapter.cc
+++ b/components/cronet/android/cronet_url_request_adapter.cc
@@ -226,6 +226,14 @@ CronetURLRequestAdapter::GetNegotiatedProtocol(JNIEnv* env,
       env, url_request_->response_info().npn_negotiated_protocol);
 }
 
+base::android::ScopedJavaLocalRef<jstring>
+CronetURLRequestAdapter::GetProxyServer(JNIEnv* env,
+                                        jobject jcaller) const {
+  DCHECK(context_->IsOnNetworkThread());
+  return ConvertUTF8ToJavaString(
+      env, url_request_->response_info().proxy_server.ToString());
+}
+
 jboolean CronetURLRequestAdapter::GetWasCached(JNIEnv* env,
                                                jobject jcaller) const {
   DCHECK(context_->IsOnNetworkThread());